74. Binomial setting? A binomial distribution will be approximately correct as a model for one of these two
sports settings and not for the other. Explain why by
briefly discussing both settings.
(a) A National Football League kicker has made 80%
If his field goal attempts in the past. This season he
attempts 20 field goals. The attempts differ widely in
distance, angle, wind, and so on.
(b) A National Basketball Association player has made
80% of his free-throw attempts in the past. This sea-
son he takes 150 free throws. Basketball free throws
are always attempted from 15 feet away with no
interference from other players.

(a) When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a person.

You watch the random digit dialing machine make 15 calls. X is the number that reach a person.

• (b) When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live

person. You watch the random digit dialing machine make calls. Y is the number of calls until the first live

person answers.

Step-by-step explanation:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt